05000443/FIN-2011003-04
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Finding | |
|---|---|
| Title | Untimely Operability Determination for Degraded Concrete Structures Housing Safety-Related Equipment. |
| Description | The inspectors identified a non-cited violation (NCV) of Technical Specification (TS) 6.7.1.a that requires written procedures be established and implemented, including administrative procedures that define authorities and responsibilities for safe operation with respect to operability determinations. Contrary to TS 6.7.1.a, NextEra identified a degraded and nonconforming condition related to reduced modulus of elasticity for buiidings housing safety related equipment on May 27,2011 but did not complete an operability determination until EC250348 was issued on June 28,2011 (AR1664399). The delayed entry of the issue into the corrective action process to assess operability was contrary to Section 4.3 of EN-AA-203-1001 that requires operability assessments be completed in a time frame commensurate with the safety significance of the issue (within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />). Seabrook subsequently completed an evaluation of the concrete issues and determined that the buildings housing safety-related equipment remained operable. Seabrook entered this performance deficiency into their corrective action program. The performance deficiency was more than minor because a reasonable doubt of operability for the affected concrete structure$ existed until further engineering evaluations were completed to demonstrate the structures and systems that they housed would remain functional under design and licensing basis conditions. The finding affected the Mitigating Systems cornerstone Objective to ensure the availability, reliability and capability of systems that respond to initiating events in order to prevent core damage. The issue was evaluated using IMC 0609, Significance Determination Process (SDP), and was determined to be of very low safety significance (Green) because the finding was not a design or qualification deficiency, did not result in an actual loss of safety function, was not a loss of a barrier function, and was not potentially risk significant for external events. The finding had a cross cutting aspect in the area of problem identification and resolution, P.1(a), because NextEra did not enter identified degraded concrete conditions for several site buildings into the corrective actions process in a timely manner, which would have ensured the shift manager completed timely operability evaluations for the affected structures. |
| Site: | Seabrook  |
|---|---|
| Report | IR 05000443/2011003 Section 1R15 |
| Date counted | Jun 30, 2011 (2011Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | J Johnson T Burns T Moslak W Raymond A Burritt A Turilin J Deboer |
| CCA | P.1, Identification |
| INPO aspect | PI.1 |
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Finding - Seabrook - IR 05000443/2011003 | |||||||||||||||||||||||||||||||||||||||||||
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Finding List (Seabrook) @ 2011Q2
Self-Identified List (Seabrook)
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